# Relationship history for MSHA mine 3200847

Current hierarchy: **Lois  Dettling → L & M Enterprises Inc → Fisher Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Watford City Ready Mix → Fisher Pit; 2009-04-07 to 2009-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Lois  Dettling → Fisher Pit; 2009-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lois  Dettling → Watford City Ready Mix; 2009-04-07 to 2009-09-15; source msha-controller-operator-history
- **operator_operates_mine:** L & M Enterprises Inc → Fisher Pit; 2009-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lois  Dettling → Fisher Pit; 2009-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lois  Dettling → L & M Enterprises Inc; 2009-09-16 to current/open; source msha-controller-operator-history